public void FunctionMemoizationExtensions_Memoize_NoMemoizer_NoArgs_CacheError()
{
var n = 0;
var res = FunctionMemoizationExtensions.Memoize <int>(() => { n++; throw new InvalidOperationException(); }, MemoizationOptions.CacheException);
Assert.AreEqual(0, n);
Assert.AreEqual(0, res.Cache.Count);
Assert.ThrowsException <InvalidOperationException>(() => res.Delegate());
Assert.AreEqual(1, n);
Assert.AreEqual(1, res.Cache.Count);
Assert.ThrowsException <InvalidOperationException>(() => res.Delegate());
Assert.AreEqual(1, n);
Assert.AreEqual(1, res.Cache.Count);
res.Cache.Clear();
Assert.AreEqual(1, n);
Assert.AreEqual(0, res.Cache.Count);
Assert.ThrowsException <InvalidOperationException>(() => res.Delegate());
Assert.AreEqual(2, n);
Assert.AreEqual(1, res.Cache.Count);
}
public void FunctionMemoizationExtensions_Memoize_NoMemoizer_NoArgs_Simple()
{
foreach (var options in new[] { MemoizationOptions.None, MemoizationOptions.CacheException })
{
var n = 0;
var res = FunctionMemoizationExtensions.Memoize(() => { n++; return(42); }, options);
Assert.AreEqual(0, n);
Assert.AreEqual(0, res.Cache.Count);
Assert.AreEqual(42, res.Delegate());
Assert.AreEqual(1, n);
Assert.AreEqual(1, res.Cache.Count);
Assert.AreEqual(42, res.Delegate());
Assert.AreEqual(1, n);
Assert.AreEqual(1, res.Cache.Count);
res.Cache.Clear();
Assert.AreEqual(1, n);
Assert.AreEqual(0, res.Cache.Count);
Assert.AreEqual(42, res.Delegate());
Assert.AreEqual(2, n);
Assert.AreEqual(1, res.Cache.Count);
Assert.IsTrue(!string.IsNullOrEmpty(res.Cache.DebugView));
}
}
public void FunctionMemoizationExtensions_Memoize_NoArgs_ArgumentChecking()
{
var m = Memoizer.Create(MemoizationCacheFactory.Unbounded);
#pragma warning disable IDE0034 // Simplify 'default' expression (illustrative of method signature)
Assert.ThrowsException <ArgumentNullException>(() => FunctionMemoizationExtensions.Memoize(default(Func <int>)));
Assert.ThrowsException <ArgumentNullException>(() => FunctionMemoizationExtensions.Memoize(default(IMemoizer), () => 42));
Assert.ThrowsException <ArgumentNullException>(() => FunctionMemoizationExtensions.Memoize(m, default(Func <int>)));
#pragma warning restore IDE0034 // Simplify 'default' expression
}
public void FunctionMemoizationExtensions_MemoizeWeak_TDelegate_ArgumentChecking()
{
var mem = Memoizer.CreateWeak(WeakMemoizationCacheFactory.Unbounded);
var a = new A(() => { });
#pragma warning disable IDE0034 // Simplify 'default' expression (illustrative of method signature)
Assert.ThrowsException <ArgumentNullException>(() => FunctionMemoizationExtensions.MemoizeWeak <A>(default(IWeakMemoizer), a, MemoizationOptions.None));
Assert.ThrowsException <ArgumentNullException>(() => FunctionMemoizationExtensions.MemoizeWeak <A>(mem, default(A), MemoizationOptions.None));
Assert.ThrowsException <ArgumentException>(() => FunctionMemoizationExtensions.MemoizeWeak <int>(mem, 42, MemoizationOptions.None));
Assert.ThrowsException <NotSupportedException>(() => FunctionMemoizationExtensions.MemoizeWeak <Q>(mem, (ref string x) => { }, MemoizationOptions.None));
#pragma warning restore IDE0034 // Simplify 'default' expression
}